BG MOA is the number one engine oil supplement, chosen 8 :1 over the next aftermarket supplier. Engines are running at higher temperatures combined with the increasing regularity of stop-and-go driving created a rapid depletion of critical oil additives. Without protective additives, severe engine oil oxidation can occur--reducing oil to heavy, black sludge in the crankcase, oil screens, oil passages, rocker arms and other critical areas of the engine. BG MOA fortifies all qualities of engine oil, providing superior, long-lasting engine protection and maintain peak engine performance. Prevents engine oil oxidation and thickening under even the most intense driving conditions. Warning: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.